You probably have nylon but not silnylon. I have some extensive experience with silnylon and if properly coated "will not leak"...Period....Lots of people like their tarps to breathe and double coated silnylon will not breathe very well at all. Really with a tarp it should not be an issue because of the tarps ability to be ventilated so easily..Hope that helps....sabre11004...

The first step that you take will be one of those that get you there !!!!!!!!